1, Earth Day is annual:
A. April 22nd b.65438+February 1
C March 12 may 1 1 day
Correct answer a
2. 1992. An important document adopted by the United Nations Conference on Environment and Development is:
A. Maritime convention B. World Nature Conservation Plan
C. Declaration on the Human Environment
Correct answer d
3.DNA is the abbreviation of English name (). It is a biomacromolecule compound in organism, which contains genetic information and carries the genetic function of life.
A. Phosphate B. Deoxyribonucleic acid
C. amino acid d nucleotide
Correct answer b
4. With the strong support of Emperor Kangxi, () compiled from 1690 to 172 1 is an encyclopedia introducing western mathematical knowledge.
A. Chongzhen almanac B. Mathematical essence
C. Essentials of Mathematics D. Ann's new method
Correct answer b
5, the sign of natural vertical division of land is:
A. Heat B. Vegetation and soil
C. Locke R.
Correct answer b
6, in the solar system:
Of the nine planets, Jupiter is the largest and Mercury is the smallest.
B Of the nine planets, except Venus and Pluto, all others are satellites.
The asteroid belt lies between the orbits of Mars and Jupiter.
C. comets have no fixed period of motion.
Correct answer c
7. The longest cross-harbour tunnel in the world is?
A. Cross-Strait Tunnel B. Japanese Han Qing Tunnel
C. Qiongzhou Strait Tunnel D Frankfurt Tunnel
Correct answer b
8. Salt in the air will:
A. Weathering B. Melting
C. crystallization D. dissolution
Correct answer b
9. Among the following metals, liquid ones are A, Hg, B, Ag, C, Mg, D and Cd.
Correct answer a
10, and the following substances are pure substances:
A. ammonia B. bleaching powder C. glacial acetic acid D. air
Correct answer c
1 1, the number of chromosomes contained in the human body is:
A.24 to B.23 to C.42 to D. 12.
Correct answer b
12, the Apollo spacecraft flew to the moon ().
A.1969b.1967c.1971year D. 1965.
Correct answer a
13, computer data refers to:
Digital symbols B. Sound and image symbols C. Text symbols D. Quantitative representation of information
Correct answer d
14, the earliest country to use wind energy is:
Ancient Egypt B. Ancient China C. Ancient India D. Ancient Greece
Correct answer a
In the solar system, the mass of the central celestial sun accounts for about a.91%b.93.7% c.98.6% d.99% of the total mass of the solar system.
Correct answer c
16, astronomers who discovered the laws of planetary motion are:
Copernicus b Galileo c Kepler d Zhang heng
Correct answer c
17, the inventor of the first steamboat was an American;
Jackson b Fulton c Edison d Wright brothers correct answer b
18, found that the magnet in the coil movement produces current scientists are:
Michael. Faraday Edison Bell Siemens
Correct answer a
19, in the second industrial revolution, the first generator is:
Michael. Faraday Edison Bell Siemens
Correct answer d
20, 1879, the American inventor () made a durable light bulb.
Fulton Edison Jackson Carter brothers
Correct answer b
2 1, 19 In the 1990s, the German () invented the diesel engine. Karl, Ben Ci, Rudolf, Dissel, Zeppelin and Siemens.
Correct answer b
22, the current worldwide environmental pollution is largely caused by the use of energy, this energy is mainly:
A.b. nuclear energy
C. Fossil resources D. Solar energy
Correct answer c
23. With the introduction of the DNA double helix model in 1930s, a crucial subject was born, which is:
A. Biochemistry B. Genetic science
C. molecular biology d molecular genetics
Correct answer c
24, the use of test-tube banana technology to promote excellent banana varieties, this technology belongs to:
A. Genetic engineering B. Cell engineering
C. Enzyme engineering D. Fermentation engineering
Correct answer b
25, electric energy is one of the most widely used energy, it belongs to:
secondary energy
C. Non-renewable energy D. Renewable energy
Correct answer a
The above is the 202 1 civil servant provincial examination simulation exercise of humanistic common sense. Of course, there are still many common idioms in the public exam, which you need to continue to accumulate, so that you can become a small Chinese dictionary and get better results in logical fill-in. The logical fill-in-the-blank in the exam is a part that many candidates find difficult to score, and the study of common sense needs to be accumulated constantly at ordinary times, so that you can be comfortable in the examination room. Wish you success!